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Acetabular compression plate with dual cortical fixation and method of fixing thereof

Inactive Publication Date: 2020-01-02
SEN RAMESH KUMAR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patent describes a new acetabular compression plate for repairing hip fractures. The plate has a unique shape that allows for dual cortical fixation, which ensures a strong grip even in osteoporotic bone. The plate can be easily and quickly fixed, reducing surgery time by a few hours. The plate can be used to repair multiple fractures around the brim of the acetabular region using a single plate. The screws are held into the bone using bi-cortical fixation to maintain proper grip. The present invention is a low-cost and reliable tool for orthopedic bone fracture repair surgery for the acetabular region.

Problems solved by technology

The plate is used where available standard plates do not provide satisfactory results e.g. in case of osteoporotic bone.

Method used

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  • Acetabular compression plate with dual cortical fixation and method of fixing thereof
  • Acetabular compression plate with dual cortical fixation and method of fixing thereof
  • Acetabular compression plate with dual cortical fixation and method of fixing thereof

Examples

Experimental program
Comparison scheme
Effect test

first embodiment

[0134]In the invention (FIG. 7 and FIG. 8), the acetabular plate (P) is fragmented into four portions viz.[0135]i. Upper extended portion (A)[0136]ii. Lower extended portion (B)[0137]iii. Lower extended portion (C)[0138]iv. Central Brim portion (D)

[0139]The central portion (D) of the acetabular plate (P) rests on the brim of the acetabular region in pelvic. This portion (D) is anatomically shaped and brim specific. The extended portions (A, B and C) of the plate have plurality of holes as illustrated in FIG. 8.

[0140]The upper extended portion (A) contains a plate holding screw hole (SH1) that initially supports and holds the plate. The lower extended portions (B and C) also contain holes (SH4) for inserting screws. The upper extended and lower extended portions are shaped as per the anatomy of the pelvic bone on which the plate rests. An anterior screw hole (SH3) is provided on the brim portion (D) of the plate to align the plate as per anatomical shape of the pelvic bone.

[0141]On t...

third embodiment

[0162]In the present invention (FIG. 14), the central brim portion (B2) of the plate is anatomically contoured to match shape of the pelvic brim to enable easy, accurate and quick fit of the plate. The brim portion also contains a screw line of several holes in which screws can be fitted and which is specifically created to facilitate the screw insertion from inside towards the outer cortex. It also has one big hole for trans-fixation screw and three small holes for 3.5 mm screws. Pubic arm or extended portion of the brim portion has 4-5 holes as per plate size. Upper flange (A2) of the body is having multiple screw hole line where the foremost posterior screw is to stabilize the plate for correct / optimum anatomical positioning of the plate. This has been achieved in a simple manner by giving threads in the hole, so that when screw is inserted, it is inserted easily and quickly at a particular position only.

fourth embodiment

[0163]In a fourth embodiment, the plate has plurality of holes on the upper flange which can vary as per size of the plate—small, medium or large. However, irrespective of the size of the plate, there are two holes on the flange of the plate which are locking holes—one along the upper rim (F1) and the second one below it (F4) of FIG. 12, which is positioned to typically lie on the anatomical brim.

[0164]Both holes have critical functionality, allowing correct and quick positioning the plate during surgery, thus drastically reducing surgery time, apart from enhancing accurate plate fixation in an easy and convenient manner for the surgeon.

[0165]The critical functionality of the two locking holes is further elaborated as below:[0166]i. Locking hole one—present on the upper flange: It permits the ‘screwing into’ of a specially designed locking sleeve (hollow). The sleeve consists of two parts—an elongated holding rod with screw threaded terminal end which gets ‘screwed’ into the locking...

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PUM

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Abstract

A plate having unique anatomical brim specific shape and enables dual cortical fixation i.e. fixation from outer cortical region and inner cortical region, in a quick and easy manner is disclosed. Dual cortical fixation using nut and bolt enables compression (grip), enabling repair of fractures in normal as well as osteoporotic bone. The plate rests on to brim of pelvic so that a single screw or more screws can be inserted into it from the outer cortex of the bone that comes out of the brim, as brim is the strongest portion and holds the screws well. The screws are held into the bone using bi-cortical fixation by means of cannulated screws which are provided with washers to increase surface area of contact with bone. Owing to ease of use, the plate drastically reduces surgery time from few hours to less than an hour.

Description

FIELD OF INVENTION[0001]The following invention relates to the field of medical devices, especially those which are used in orthopedic surgery. More specifically the present invention relates to a novel acetabular compression plate with dual cortical fixation and method of fixing thereof. The plate is suitable for reconstructing acetabular fractures especially in osteoporotic bone and is made up of suitable metal such as medical grade stainless steel, titanium or the like.BACKGROUND OF THE INVENTION[0002]Fractures of the hip region (acetabulum) are common due to accidents, falls etc. and are very difficult to repair. Existing methods involve use of metal ‘plates’ which need to be fixed with screws in the hip region.[0003]Limitations of existing plates[0004]i. Loosening with passage of time—Plates become loose after some time as fixing is from one side only. With passage of time the fixing screws lose their grip due to which the plates become loose. Existing plates have no provision ...

Claims

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Application Information

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IPC IPC(8): A61B17/80A61B17/86
CPCA61B2017/564A61B17/864A61B17/8014A61B17/8057A61B17/8066A61F2/34
Inventor SEN, RAMESH KUMAR
Owner SEN RAMESH KUMAR